import re

from django.contrib.auth.backends import ModelBackend

from .models import User
def jwt_response_payload_handler(token, user=None, request=None):
    '''自定义登入实现token状态保持'''
    return {
        'token': token,
        'user_id': user.id,
        'username': user.username
    }

def get_user_by_account(account):
    '''
    根据帐号获取user对象
    :param account: 账号，可以是用户名，也可以是手机号
    :return: User对象 或者 None
    '''
    try:
        if re.match(r'^1[3-9]\d{9}$', account):
            user = User.objects.get(mobile=account)

        else:
            user = User.objects.get(username=account)
    except User.DoesNotExist:
        return None
    else:
        return user

class UsernameMobileAuthBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        user = get_user_by_account(username)
        if user is not None and user.check_password(password):
            return user
